Dough-mixing machine.



No. 779,010. PATENTED JAN. 3, 1905.

L. ST. JEAN.

DOUGH MIXING MACHINE.

APPLICATION FILED JULY 29, 1904.

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L. ST JEAN.

DOUGH MIXING MACHINE.

APPLICATION FILED JULY 29, 1904.

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Witnaoaeo attoznw No. 779,010. PA'I'ENTED JAN. 3, 1905. L.ST.JEAN.

DOUGH MIXING MACHINE.

APPLIGATION FILED JULY 29, 1904.-

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Patented January 3, 1905.

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LOUIS ST. JEAN, OF CHICAGO, ILLINOIS.

DOUGH-MIXING MACHINE.

SPECIFICATION forming part of Letters Patent No. 779,010, dated January3, 1905. Application filed July 29, 1904:. Serial No. 218,714-

To aZZ whom it may concern:

Be it known that I, Loms ST. JEAN, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented new and useful Improvements in Dough-hIiriing Machines, ofwhich the following is a specification.

This invention relates to dough-mixing machines, such as are designedparticularly for use in bakeries and the like where it is necessary tomix large quantities of dough.

In machines of the character indicated as heretofore constructed greatdifficulty has been experienced in removing the mixed dough from themachine. One object of the present invention, therefore, is to improvethe construction of dough-mixing machines in such manner as tofacilitate the operation of removing therefrom the mixed dough.

A further objection to dough-mixing machines as generally constructed isthat they fail thoroughly and quickly to mix the dough. For this reasona second object of the present invention is to improve the interiorconstruction of the mixing-receptacle in such manner as to secure athorough and rapid mixing 'of the dough.

A third objection to prior forms of doughmixing machines is that theclosing means of the receptacle in which the dough is mixed frequentlyproves ineffective, whereby the dough is caused to leak or exude at thejoint between the cover and the receptacle proper. Therefore the thirdobject of the invention is to improve the means for locking the coverupon the receptacle in such manner that the possibility of dough exudingat the joint will be avoided. v The first object of the invention isattained, preferably, by providing a removable cover for thedough-mixing receptacle and by mounting in the frame of the machineasupplemen- 'tal shaft having members adapted to engage the removablecover, whereby when the cover has been unlocked from the receptacle andthe supplemental shaft rotated said cover will be removed entirely fromthe receptacle and elevated thereabove, after which by turning thereceptacle upon its journal-bearings the mixed dough will drop therefromby gravity into any suitable receiving-receptacle placed beneath themachine.

The second object of the invention is attained, preferably, by providingthe doughmixing receptacle interiorly with a plurality of blades and byplacing upon the removable cover thereof a plurality of spikes, theblades and spikes being arranged in spiral position with respect to eachother.

The third object of the invention is attained, preferably, by employinga plurality of removable straps for holding the cover in position uponthe receptacle and by providing improved lockingdevicesforthe strapswhich will first exert a stretching or tightening action upon the strapsand then lock them securely in position, whereby suitable gasketsdisposed between the cover and the receptacle will be compressed toprevent the leakage of dough.

In the accompanying drawings, forming part of this specification, Figure1 isa side elevation of a dough-mixing machine constructed in accordancewith the invention. Fig. 2 is a plan view thereof. Fig. 3 is atransverse vertical section. Fig. 4: is an end elevation. Fig. 5 is aplan view of the doughmixing receptacle with the cover thereof re moved.Fig. 6 is an under plan view of the cover, showing the arrangement ofthe pyramidal spikes. Fig. 7 is'a perspective view of' the supplementalshaft with its pivot members adapted for removing, holding, andreplacing the cover of the dough-mixing receptacle. Fig. 8 is atransverse section through part of the dough-mixing receptacle andcover, showing the position of the gasket and looking devices when thecover is closed.

Like reference numerals indicate corresponding parts in the differentviews.

The reference-numerals 1 2 indicate the uprights of any suitable form offrame, in which the shaft 3 of the octagonal dough-mixing receptacle lis journaled. The shaft 3 of the rotary dough-mixing receptacle isprovided at one end with a gear-wheel 5, in mesh with a train ofgear-wheels 6 7, which are rotated by a suitable belt-wheel 8 when themachine is operated by steam or other suitable motorpower. At itsopposite end the shaft 3 is provided with a gear-wheel 9, meshing withsuitable gear-wheels and 11, operated by means of a crank 12 whenhand-power is used to rotate the dough-mixing receptacle.

removable cover 13.

Although it will be understood that the in vention is not to be limitedto the use of an octagonal dough-mixing receptacle, still it ispreferred that such form of receptacle be used and that abodily-removable cover 13 be used in connection with the receptacle.Interiorly the receptacle is provided with a plurality of blades 14,which are spaced apart longitudinally and arranged in spiral positionwith respect to each other, as shown in Fig. 5, one of the blades beingplaced, preferably, upon each of the fiat faces of the receptacle.Disposed upon the under surface of the removable cover 13 is a pluralityof downwardlydepending or interiorly-projecting spikes 15, whichpreferably are pyramidal in shape and are arranged in spiral positionwith respect to each other, as shown in Fig. 6.

The removable cover 13 is held in position upon the dough-mixingreceptacle preferably by using straps, such as 16, Fig. 2, which may beeither flexible in their nature or else composed of metallic sectionshinged to each other. One end of each strap is perforated to engage ahook-bracket, such as 17, Fig. 4, and the other end is perforated toreceive a locking device, such as 18, which comprises a pivoted latchadapted to be held in locked position by means of a swinging pivotmember or retaining device 19. After the cover 13 has been placed uponthe dough-mixing receptacle the straps 16 are engaged with thehook-brackets 17. Thelocking devices or pivot members 18 are then passedthrough the perforations, such as 20, in the opposite ends of thestraps. By forcing the locking devices fiat down against the receptaclethe straps 18 are first stretched sufiiciently to compress the gasketsor packing 21, disposed upon the shouldered joint between the cover andreceptacle, and then locked securelyin position by turning the retainingdevice 19 upon its pivot until it rests across the locking device 18, asshown clearly in Figs. 1 and 8.

Disposed upon the upper surface of the removable cover 13 is a pluralityof brackets, such as 22, each of which is slotted, as shown at 23, toreceive a pin or projection 24 upon an arm or swinging member 25,pivoted upon a supplementalshaft 26, journaled in the machine-frame. Thesupplemental shaft 26 is adapted to be rotated by means of acrank 27 andis provided with a ratchet-wheel 28, with which cooperates a pivotedpawl 29, Fig. 4. It will be understood that the pivot members 25 uponthe supplemental shaft 26 are adapted to be swung into and out ofengagement with the slotted brackets 22 upon the When it is desired toremove the contents of the dough-making receptacle, the straps 16 areremoved and the the cover 13 has been raised to the position shown inFig. 4 it is necessary only to rotate the dough-mixing receptacle untilit is disposed upside down, thus permitting the contents thereof to fallby gravity into any suitable receiving-receptacle (not shown) disposedthereunder.

It has been found in practice that the form of blades illustrated anddescribed, in combination with the pyramidal spikes upon the removablecover, serve effectively and quickly to mix the dough contained in therotary receptacle 4.

Changes in the precise embodiment of invention illustrated and describedmay be made within the scope of the following claims without departingfrom the spirit of the invention or sacrificing any of its advantages.

It has been found in practice that by using 5 a wooden dough-mixingreceptacle the dough is induced to rise without the necessity ofremoving it to another receptacle and subjecting it to the action ofheating. The present invention therefore contemplates the use of awooden receptacle for the purpose specified.

Having thus described the invention, what is claimed is 1. Adough-mixing machine comprising a rotary receptacle having a removablecover, and mechanism for removing, holding and replacing the cover.

2. A dough-mixing machine comprising a frame, a rotary receptacletherein, a removable cover upon the receptacle, slotted brackets uponthe cover, a supplemental shaft, and pivot members upon the supplementalshaft having pins to engage the slotted brackets and remove the coverfrom the receptacle.

3. A dough-mixing machine having a rotary receptacle, a removable coverupon the receptacle, engaging means upon the cover, a supplementalshaft, and means upon the supplemental shaft to cooperate with theengaging means upon the cover and to remove, hold and replace the coverof the receptacle.

4. A dough-mixing machine comprising a rotary receptacle, a removablecover upon the receptacle, hook-brackets upon one side of thereceptacle, locking and retaining devices upon the opposite sidethereof, and straps engaged with the hook-brackets on one side and withthe locking devices upon the other, said straps holding the cover inposition.

5. A dough-mixing machine comprising a frame, a rotary receptacletherein, a removthe cover, and being adapted to raise said I able coverupon the receptacle, removable cover from the-rotary receptacle.

means holding the cover in place, slotted In testimony WhereofIafliX mysignaturein brackets upon the cover,asupplementary shaft presence of twoWitnesses.

5 in the frame a ratchet-Wheel upon the shaft, w

a pivoted pai vl cooperating With the ratchet- LOUIb J Wheel, and pivotmembers upon the supple- Witnesses: mentary shaft, said pivot membershaving PETER BENJ. KENNEDY,

pins adapted to engage the slotted brackets of EUGENE LAroURTE.

